The excitable teens reportedly "thumped on the walls and rattled the windows" of the theater, where the 24-year-old actor was promoting his film "Kill Your Darlings."
"I've been dealing with it in various ways since I was 11," Radcliffe told the press. "I'm incredibly grateful for the swirl of support behind me. My fans seem excited by the unconventional path I am taking."
Radcliffe plays gay beat poet Allen Ginsberg in the film, which has garnered positive reviews from critics.
Celebrity Families of 2014 [PHOTOS]